You would normally hire a realtor unless you are going for foreclosure auction sales at the courthouse steps, in which case you would hire an attorney.
As for bidding, it all depends on the type of property, location, condition and the initial price set by the bank. Sometimes foreclosures sell for less than the asking price.
Oggi Kashi - 415.690.3792 direct
Broker Associate, Paragon Real Estate Group CA DRE 01844627
All data from sources deemed reliable but subject to errors and omissions, and not warranted.